App-development and App-serving (MERN: MySQL, Express, React, Node; etc), and Web-hosting.
This demo comes from consulting work, where the demo is an altered, open source version of the app used by the client business.
Meta-App-development / Code Template.
For this demo, the code source is the real focus here, for code design, rather than the app itself.
(+ persistent state with local storage and custom hooks)